KR101203462B1 - System for supplying multicast/broadcast service through wibro/wimax network and method using the same - Google Patents

Abstract

The MBS providing system using the WiBro / WiMAX network of the present invention provides an MBS control unit for generating a start and end of an MBS bearer session, and allocation and release of quality of service (QoS) for start and end of an MBS bearer session received from the MBS control unit. A QoS control unit for requesting a request, assigning a multicast SFID for the MBS bearer session to provide the MBS bearer traffic received from an MBS content source to an MBS subscriber station when the QoS allocation is requested, and requesting the release of the QoS to be requested. The RAS for allocating the multicast CID corresponding to the allocated multicast SFID according to the ACR for releasing the allocated multicast SFID and the MBS bearer traffic request from the MBS subscriber, and controlling the radio duration resource with the MBS subscriber station. Characterized in that it comprises a.

MBS, QoS, WiBro, WiMAX, Authentication

Description

System and method for providing multicast / broadcast service using WiBro / WiMAX network {SYSTEM FOR SUPPLYING MULTICAST / BROADCAST SERVICE THROUGH WIBRO / WIMAX NETWORK AND METHOD USING THE SAME}

1 is a block diagram illustrating an MBS providing system using a WiBro / WiMAX network according to an embodiment of the present invention.

2 is a flowchart illustrating an operation of allocating QoS for an MBS bearer session in an MBS providing method according to an embodiment of the present invention.

3 is a flowchart illustrating an operation of releasing QoS for an MBS bearer session in an MBS providing method according to an embodiment of the present invention.

4 is a flowchart illustrating an operation of subscribing to an MBS service of an MBS subscriber in an MBS providing method according to an embodiment of the present invention.

5 is a flowchart illustrating an operation of MBS when an MBS subscriber station is initialized in an MBS providing method according to an embodiment of the present invention.

FIG. 6 is a flowchart illustrating an operation of allocating QoS when an MBS service request is made by an MBS subscriber station in an MBS providing method according to an embodiment of the present invention.

7 is a flowchart illustrating an operation of releasing QoS when an MBS service requested by an MBS subscriber station is interrupted in an MBS providing method according to an embodiment of the present invention.

8 is an operation flowchart for fast channel authentication in the MBS providing method according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

110: MBS control unit

120: QoS control unit

130: user authentication server

150: wireless access station (RAS)

151: wireless section resource providing unit

160: access control router (ACR)

161: MBS provider

162: MBS request unit

The present invention relates to a multicast / broadcast service (hereinafter referred to as "MBS"), and more particularly, to provide an MBS to a terminal connected to a WiBro / WiMAX network using a WiBro / WiMAX network. The present invention relates to an MBS providing system using WiBro / WiMAX network and a method thereof.

WiBro / WiMAX networks communicate in a unicast manner when providing voice and data services. When a wireless terminal requests an application service that requires Quality of Service (QoS) such as voice and video telephony, it receives the request from the application layer and sends it to the policy function (PF) responsible for QoS control of the access network. The PF requests QoS to the WiBro / WiMAX access network to provide QoS at the network layer.

However, in the MBS service, for example, the Internet Protocol Television (IPTV) service, when a user selects a specific IPTV channel, the mobile terminal transmits a message including a multicast IP address corresponding to the IPTV channel to the WiBro / WiMAX access network. In this case, the message including the multicast IP address may be an Internet Group Management Protocol (IGMP) message in the case of IPv4, and a multicast listener discovery (MLD) message in the case of IPv6.

The WiBro / WiMAX access network receiving the IGMP / MLD message selects an IP multicast stream identical to the multicast IP address included in the IGMP / MLD message and transmits the same to the terminal. At this time, even if multiple IPTV users simultaneously select the same IPTV channel, only one IPTV stream is transmitted to the terminal in a multicast manner.

As such, unlike the unicast voice and video call in the IPTV service, the service request of the terminal is not received at the application layer. Instead, the IPTV service receives the IGMP / MLD message in the WiBro / WiMAX access network and transmits the multicast stream to the terminal. There is a need for a QoS providing structure that is different from the QoS providing structure applied to unicast application services.

Since the IPTV service is a structure in which one IP multicast stream corresponding to an IPTV channel is transmitted to a plurality of mobile terminals in a multicast manner, the IP multicast stream corresponding to each IPTV channel is not provided to provide QoS to specific mobile terminals. It has a structure that provides QoS for.

In addition, when authentication is performed for the IPTV service in the same manner as in the MBMS (Multimedia Broadcast / Multicast Service) proceeding with 3GPP standardization, the WiBro / WiMAX access network requests IGMP / MLD requesting the IPTV channel change from the mobile terminal. Each time a message is received, service authentication with the IPTV control node must be performed. That is, whenever an IPTV channel is changed by the terminal, service authentication must be performed through interworking between the WiBro / WiMAX access network and the IPTV control node, thereby making it impossible to change the channel quickly as in a conventional TV broadcast. Therefore, in order to provide fast channel change of IPTV service in WiBro / WiMAX access network, an IPTV service authentication method different from service authentication provided by 3GPP MBMS is required.

The present invention has been made to solve the problems of the prior art as described above, an object of the present invention to provide QoS for MBS over WiBro / WiMAX network.

It is also an object of the present invention to provide fast channel change by performing user authentication in an access control router.

In order to achieve the above object and solve the problems of the prior art, the multicast / broadcast service providing system using the WiBro / WiMAX network of the present invention MBS control unit for generating the start and end of the MBS bearer session (bearer session) A QoS control unit for requesting allocation and release of quality of service (QoS) for the start and end of an MBS bearer session received from the MBS control unit; and if the QoS allocation is requested, MBS bearer traffic received from an MBS content source. An access control router (ACR) for allocating a multicast service flow identifier (SFID) for the MBS bearer session to be provided to a subscriber station and releasing the assigned multicast service flow identifier when the QoS release is requested; The allocated multicast service player according to whether the MBS bearer requests the MBS bearer traffic Assigning a multicast connection separator (CID) corresponding to the right and a separator, it characterized in that it comprises a radio access station (RAS) for controlling a radio link and the resources of the subscriber station MBS.

In this case, the MBS providing system may further include a user authentication server for receiving the MBS subscriber profile provided by the MBS control unit, and transmits the received MBS subscriber profile to the access control router.

In this case, the user authentication server may receive the user information requesting the MBS bearer traffic from the access control router, and may perform the authentication process of the user based on the MBS subscriber profile.

In this case, the access control router performs the authentication process of the user requesting the MBS bearer traffic based on the MBS subscriber profile received from the user authentication server, and if the user is authenticated A cast service flow identifier and the MBS bearer traffic may be provided to the radio access station.

At this time, the access control router performs the authentication process of the user requesting the MBS bearer traffic based on the MBS subscriber profile received from the user authentication server, and if the user is authenticated, the multicast allocated for the MBS bearer traffic Receiving an MBS provider and a MBS bearer traffic request for providing a service flow identifier to the radio access station, providing user information to the MBS provider, requesting QoS for the MBS bearer session to the MBS provider, It may include an MBS request unit for transmitting the MBS bearer traffic to the MBS subscriber terminal of the user.

In this case, the radio access station provides user information on the MBS bearer traffic request to the access control router, and transmits the MBS bearer traffic to the MBS subscriber terminal of the user when the user is authenticated based on the MBS subscriber profile. Assigns a multicast connection identifier corresponding to the multicast service flow identifier assigned to the MBS requester and the requested MBS bearer traffic, and provides QoS when delivering the requested MBS bearer traffic to the user's MBS subscriber station; It may include a radio section resource providing unit for performing the admission control on the requested MBS bearer traffic to reserve the radio section resources to enable.

In this case, authentication of the user based on the MBS subscriber profile may be performed at the access control router or at the user authentication server.

In this case, when the MBS subscriber is registered, the MBS controller may update the MBS subscriber profile and provide the updated MBS subscriber profile to the user authentication server.

In this case, the multicast service flow identifier may have a unique value to distinguish the MBS bearer session in the same MBS zone.

In this case, the multicast / broadcast service may be an Internet Protocol Television (IPTV) service.

Method for providing a multicast / broadcast service using a WiBro / WiMAX network according to an embodiment of the present invention comprises the steps of generating a start and end of the MBS bearer session in the MBS control unit, the quality of service (QoS) control unit Requesting allocation and release of QoS for the start and end of an MBS bearer session received from an MBS control unit; when the QoS allocation is requested by an access control router (ACR), MBS bearer traffic received from an MBS content source; Allocating a multicast service flow identifier (SFID) for the MBS bearer session to be provided to a subscriber station, releasing the assigned multicast service flow identifier when the QoS release is requested, and a radio access station (RAS). The multicast server according to whether the MBS subscriber requests the MBS bearer traffic Assigning a multicast connection separator (CID) corresponding to switch a flow separator, and characterized in that it comprises the step of controlling a radio link and the resources of the subscriber station MBS.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating an MBS providing system using a WiBro / WiMAX network according to an embodiment of the present invention.

Referring to FIG. 1, the MBS providing system includes an MBS controller 110, a QoS controller 120, a user authentication server 130, an MBS subscriber station (SS / MS) 140, and a wireless access station (ACR) 160. , Access control router (RAS) 150, and MBS content source 170.

The MBS control unit 110 generates the start and end of the MBS bearer session, requests the QoS control to allocate and release the QoS, and controls the MBS content source 170 to ACR MBS bearer traffic for the MBS bearer session. To send.

In this case, when the MBS subscriber is newly registered, the MBS controller 110 may update the MBS User Profiles and provide the updated MBS subscriber profile to the user authentication server.

In this case, the MBS controller 130 may perform an MBS service subscription function for the MBS subscriber station.

The QoS controller 120 requests allocation and release of QoS for the start and end of the MBS bearer session received from the MBS controller. At this time, the QoS control unit includes a Home Policy Function (H-PF) 121 and a Visited Policy Function (V-PF) 122.

The H-PF 121 refers to the PF existing in the home network, and the V-PF 122 refers to the PF existing in the visited network. At this time, the PF is in charge of the PDP (Policy Decision Point) function for QoS control.

The user authentication server 130 stores the MBS subscriber profile received from the MBS controller, transmits the received MBS subscriber profile to the ACR, and performs the functions of authentication, authority verification, and charging of the MBS subscriber.

In this case, the user authentication server includes an Authentication Authorization Accounting (AAA) 131 existing in the home network and a Proxy AAA (132) existing in the network.

In this case, when the MBS subscriber is newly registered, the user authentication server 130 receives and stores the updated MBS subscriber profile by the MBS controller, and transmits the updated MBS subscriber profile to the ACR.

At this time, the user authentication server 130 may receive the user information requesting the MBS bearer traffic from the ACR, and may perform the authentication process of the user based on the MBS subscriber profile received from the MBS controller.

In this case, the user information may include MBS subscriber information and information on requested MBS bearer traffic.

The ACR 160 provides a multicast service flow identifier for the MBS bearer session so that the MBS bearer traffic received from the MBS content source can be provided to the MBS subscriber station 140 when QoS allocation is requested by the QoS control unit 120. multicast SFID), and releases the allocated multicast SFID when QoS cancellation is requested by the QoS control unit.

In this case, the multicast SFID may have a unique value to distinguish the MBS bearer session in the same MBS zone.

In addition, when the MBS bearer traffic is requested from the MBS subscriber station, the ACR 160 performs a user authentication process based on the MBS subscriber profile received from the user authentication server, and when the user is authenticated by the user authentication process, The multicast SFID allocated to the MBS bearer session corresponding to the requested MBS bearer traffic is provided to the RAS.

Of course, the user authentication process may be performed in the ACR or may be performed in the user authentication server.

The ACR 160 may include an MBS provider 161 and an MBS requester 162.

The MBS provider 161 performs the authentication process of the user who requested the MBS bearer traffic based on the MBS subscriber profile received from the user authentication server, and if the user is authenticated, the multicast SFID allocated for the MBS bearer traffic to the RAS. to provide.

In this case, the MBS provider 161 may include a means for storing the MBS subscriber profile received from the user authentication server.

The MBS requester 162 provides the user information on the MBS bearer traffic request to the MBS provider, and transmits the MBS bearer traffic to the MBS subscriber terminal of the user when the user is authenticated.

At this time, the authentication process for the user requesting the MBS bearer traffic is made based on the user information and the MBS subscriber profile provided by the MBS requester. The authentication process for such a user is performed by the MBS provider or by the user authentication server. Can be.

In this case, a function for receiving an MBS bearer traffic request from the subscriber, for example, the IGMP snooping / proxy function may request the QoS from the MBS provider in place of the application function function.

The RAS 150 allocates a multicast CID corresponding to the multicast SFID allocated by the ACR according to whether the MBS subscriber requests the MBS bearer traffic, and controls the radio duration resource with the MBS subscriber station.

In this case, the RAS 150 may include a radio section resource providing unit 151.

The radio section resource providing unit 151 allocates a multicast CID corresponding to the allocated multicast SFID so as to provide MBS bearer traffic requested by the user to the MBS subscriber terminal of the user. Control the radio duration resources of the to provide the MBS bearer traffic requested by the user to the MBS subscriber station.

In the diagram according to the embodiment of the present invention shown in FIG. 1, the MBS request unit is configured in the ACR, but may be configured in the RAS.

That is, the ACR may include an MBS provider, and the RAS may include a radio interval resource provider and an MBS requester. Accordingly, when a request for MBS bearer traffic occurs from an MBS subscriber station, the MBS requester of the RAS receives a message requesting MBS bearer traffic, for example, an IGMP / MLD join message, and notifies the ACR that the MBS bearer traffic is requested. . The MBS provider of the ACR may receive the user information from the RAS, transmit the received user information to the user authentication server, and perform the user authentication process through the user authentication server or directly perform the user authentication process in the ACR. In this case, the user authentication process may be performed based on the MBS subscriber profile.

A detailed operation description according to an embodiment of the present invention illustrated in FIG. 1 will be described with reference to FIGS. 2 to 8. Hereinafter, the operation of the present invention will be described as a case where MBS is an IPTV service.

2 is a flowchart illustrating an operation of allocating QoS for an MBS bearer session in an MBS provisioning method according to an embodiment of the present invention, and illustrating an MBS bearer session setup procedure.

Referring to FIG. 2, in the process of allocating QoS, the MBS controller transmits an MBS-Session-Create message to the H-PF before transmitting the IPTV bearer traffic to the WiBro / WiMAX network.

At this time, the MBS-Session-Create message includes the MBS Flow ID, MBS Zone ID, and Media flow description parameters.

Here, the MBS Flow ID is used as a factor for distinguishing an IPTV bearer session in the MBS control unit, MBS content source, H-PF, V-PF, and ACR, and the media flow description includes information on the IPTV bearer session.

Media flow description includes multicast IP address, unicast source IP address for IPTV traffic, UDP port, MBS type, media type, codec, and QoS requirements. In this case, the MBS type may be multicast or broadcast, the media type may be any one of video, audio, and text, and the QoS requirements may be bandwidth and QoS class.

MBS Zone ID is a parameter used to indicate in which area of the WiBro / WiMAX network the MBS flow corresponding to the IPTV channel is valid. When a handover occurs in which a wireless terminal moves to an area belonging to the same MBS zone, No need to connect MBS again to receive it. However, if the MBS Zone ID is moved to another zone, the MBS connection must be reestablished. Therefore, the multicast IP address and the unicast source IP address that distinguish IPTV channels have unique values within the same MBS zone.

The H-PF receives the MBS-Session-Create message, extracts the QoS policy from the media flow description, and sends the MBS-RESV-REQ message requesting the QoS allocation to the ACR to the V-PF.

In this case, the MBS-RESV-REQ message includes MBS Flow ID, MBS Zone ID, MBS type, 5-Tuple, Required Bandwidth, and QoS Priority parameters, and each parameter can be known to those skilled in the art. Because it does not explain.

The V-PF maps the QoS policy included in the MBS-RESV-REQ message to the local QoS policy of the visited network, and then sends an MBS-RESV-REQ message requesting QoS allocation to the ACR.

The ACR assigns a multicast SFID for an IPTV bearer session divided by a multicast IP address and a unicast source IP address, and sends an MBS-RESV-RSP message to the V-PF.

In this case, the MBS-RESV-RSP message includes an MBS Flow ID and a QoS Reservation Result parameter.

In this case, the multicast SFID assigned by the ACR to the IPTV bearer session is a unique value within the MBS zone. In the present invention, the IPC service request message, for example, an IGMP / MLD join message is not received from the MBS subscriber station. do.

The V-PF transmits an MBS-RESV-RSP message to the H-PF, and the H-PF transmits an MBS-Session-Response for the MBS-Session-Create message to the MBS controller.

The MBS control unit transmits an MBS-Session-Start message requesting transmission of IPTV bearer traffic divided into a multicast IP address and a unicast source IP address.

The MBS content source transmits an IPTV multicast stream, which is IPTV bearer traffic, to the IP network through control by the MBS controller, and the ACR receives IPTV bearer traffic transmitted to the IP network. At this time, the ACR uses the IP multicast routing protocol to receive IPTV bearer traffic.

The ACR illustrated in the QoS allocation process of FIG. 2 may be an MBS provider configured in the ACR.

3 is a flowchart illustrating an operation of releasing QoS for an MBS bearer session in an MBS providing method according to an embodiment of the present invention.

Referring to FIG. 3, in the process of releasing QoS, when stopping transmission of IPTV bearer traffic to a WiBro / WiMAX network, the MBS controller transmits an MBS-Session-Stop message including an MBS Flow ID to the MBS content source. In this case, the MBS-Session-Stop message may be delivered from the MBS content source to the MBS controller.

The MBS content source stops sending IPTV multicast streams.

When the transmission of the IPTV multicast stream is stopped, the MBS controller transmits an MBS-Session-Delete message to the H-PF requesting the release of the IPTV bearer session. At this time, the MBS-Session-Delete message includes the MBS Flow ID, MBS Zone ID, and Media Flow Description parameters.

H-PF sends an MBS-REL-REQ message to V-PF requesting QoS release for IPTV bearer sessions identified by MBS Zone ID, multicast IP address, and unicast source IP address. -Send MBS-REL-REQ message received from PF to ACR.

When there is an MBS subscriber station (SS / MS) registered in an IPTV bearer session requesting QoS release, the ACR transmits an MBS-REL-REQ message requesting QoS release for the SS / MS to the RAS.

The RAS receives the MBS-REL-REQ message and sends a DSD-REQ message to the SS / MS to release the QoS.

When the RAS receives the DSD-RSP message in response to the DSD-REQ message from the SS / MS, the RAS retrieves the multicast CID corresponding to the IPTV bearer session requesting QoS release, releases the radio duration resource associated with the SS / MS, and The MBS-REL-RSP (MS ID, MBS Zone ID, Multicast SFID) message, which is a response message for the release, is transmitted to the ACR.

The ACR retrieves the multicast SFID for the IPTV bearer session requesting the QoS release, and sends an MBS-REL-RSP (MBS Flow ID, QoS Release Result) message to the V-PF.

V-PF sends MLS-REL-RSP message received from ACR to H-PH, and H-PF releases QoS by sending MBS-Session-Response (MBS Flow ID, QoS Release Result) message to MBS controller. Releases the QoS of the IPTV bearer session that requested the request.

The ACR illustrated in the QoS release process of FIG. 3 may be an MBS provider configured in the ACR, and the RAS may be a radio interval resource provider configured in the RAS.

4 is a flowchart illustrating an operation of subscribing to an MBS service of an MBS subscriber in an MBS providing method according to an embodiment of the present invention.

Referring to FIG. 4, when an MBS user newly subscribes to an IPTV service or changes an IPTV service previously viewed and subscribed to, an MBTV subscriber terminal (SS / MS) transmits an IPTV Service Subscription Request (HTTP) message to an MBS controller. .

In this case, as an example of the change of the IPTV service, a subscriber receiving a basic channel may change to a subscriber receiving a premium channel.

After performing the AAA function (authentication, authority) for the SS / MS, the MBS controller transmits an IPTV User Content Lists (HTTP) message to the SS / MS.

At this time, the IPTV User Content Lists include information on an IPTV bearer session and a Digital Rights Management (DRM) key for content security of an application layer.

The MBS control unit sends an MBS user profile update (MBS user profile) message, which is an updated MBS subscriber profile message, to the AAA. At this time, the updated MBS subscriber profile includes a list of IPTV bearer sessions (multicast IP address, unicast source IP address) that can be received by the SS / MS.

AAA transmits to PAAA by adding Network Access Identifier (NAI) to distinguish newly registered SS / MS or SS / MS that changed IPTV service to updated MBS subscriber profile message received from MBS control unit. / MS delivers the updated MBS subscriber profile to the connected ACR.

The ACR receives the updated MBS subscriber profile, records the MBS subscriber profile for the SS / MS in the local DB, and sends an MBS User Profile Update Response (SS / MS NAI, Update Result) message to the PAAA. .

PAAA sends MBS User Profile Update Response (SS / MS NAI, Update Result) message to AAA, and AAA sends MBS User Profile Update Response (Update Result) message to MBS control unit. The operation of the system is completed.

5 is a flowchart illustrating an operation of MBS when an MBS subscriber station is initialized in an MBS providing method according to an embodiment of the present invention.

Referring to FIG. 5, when the MBS subscriber station (SS / MS) is initialized, the ACR recognizes that the SS / MS is authenticated by accessing the WiBro / WiMAX network and requests the MBS subscriber profile for the SS / MS. MBS User Profile Request (SS / MS NAI) message is transmitted to PAAA.

PAAA sends MBS User Profile Request (SS / MS NAI) message to AAA, and AAA receives MBS User Profile Update (SS / MS NAI, MBS) which is updated to PAAA by receiving message requesting MBS subscriber profile. user profiles) message.

The PAAA receives the updated MBS subscriber profile and transmits the updated MBS subscriber profile to the ACR to which the SS / MS is connected.

At this time, the ACR records the MBS subscriber profile for the SS / MS in the local DB and transmits a response message (MBS User Profile Update Response) indicating that the MBS subscriber profile requested by the PAAA has been received. PAAA sends a response message to the AAA indicating that the MBS subscriber profile has been received.

FIG. 6 is a flowchart illustrating an operation of allocating QoS when an MBS service request is made by an MBS subscriber station in an MBS providing method according to an embodiment of the present invention.

Here, it is assumed that the MBS subscriber station has subscribed to the MBS service through the process shown in FIG. 4.

Referring to FIG. 6, the ACR receives an IPTV multicast stream from an MBS content source through the process illustrated in FIG. 2.

When the user of the MBS subscriber station (SS / MS) selects the IPTV service, the SS / MS transmits a message for requesting the selected IPTV bearer traffic, for example, an IGMP / MLD join message, to the WiBro / WiMAX network. At this time, the multicast IP address and unicast source IP address included in the IGMP / MLD join message are used as the IPTV channel identifier selected by the user in the WiBro / WiMAX network.

The ACR sends a MBS-REG-REQ-IND (SS / MS NAI, MBS Zone ID, MBS Flow ID) message to the QoS controller, for example, a message indicating that IPTV bearer traffic is requested to the PF, and the PF sends an IPTV bearer session. A MBS-REG-REQ (SS / MS NAI, MBS Flow ID) message, which is a message for requesting registration of an SS / MS, is transmitted to the ACR. In this case, when a fast channel change of the IPTV service is required, the process between the ACR and the PF may be omitted.

ACR selects a pre-assigned multicast SFID from the multicast IP address and the unicast source IP address included in the IGMP / MLD join message, and requests MBS-REG-REQ (SS / MS ID, Multicast SFID, 5-tuple, Bandwidth, QoS Priority) message is sent to RAS.

The RAS performs admission control on radio interval resources with the SS / MS that requested IPTV bearer traffic. At this time, the admission control for the radio interval resource is performed when the SS / MS is the first terminal requesting the IPTV bearer traffic. That is, when the SS / MS is not the first terminal requesting IPTV bearer traffic, the admission control function does not need to be performed because the admission control function is already performed.

If the radio section resource allocation is possible through the admission control, the RAS allocates a multicast CID and then transmits a DSA-REQ message indicating that the radio section resource is allocated to the SS / MS and receives a DSA-RSP response message from the SS / MS. do.

The RAS sends an MBS-REG-RSP (SS / MS ID, Multicast SFID, MBS Registration Result) message indicating that the SS / MS is registered in the IPTV bearer session to the ACR, and the ACR sends the MBS-REG-RSP (SS / MS). MS NAI, MBS Flow ID, MBS Registration Result) message is sent to the PF. In this case, the process of transmitting a message from the ACR to the PF may be omitted when a fast channel change of the IPTV service is required.

The ACR sends IPTV bearer traffic to the RAS to provide the IPTV bearer traffic requested by the SS / MS to the SS / MS.

When the IPTV bearer traffic is provided to the SS / MS by the above process, the same IPTV bearer traffic is requested from another SS / MS. At this time, the admission control process in the RAS is omitted.

7 is a flowchart illustrating an operation of releasing QoS when an MBS service requested by an MBS subscriber station is interrupted in an MBS providing method according to an embodiment of the present invention.

Referring to FIG. 7, when the user of the SS / MS selects to stop watching the IPTV service, the SS / MS transmits a message indicating a service interruption, for example, an IGMP / MLD Leave message, to the WiBro / WiMAX network. At this time, the multicast IP address and unicast source IP address included in the IGMP / MLD Leave message are used as the IPTV channel identifier that the user requests to interrupt the service in the WiBro / WiMAX network.

The ACR sends an MBS-REG-REL-IND (SS / MS NAI, MBS Flow ID) message to the PF, a QoS control unit, indicating that the user has requested service interruption, and the PF deregisters the SS / MS for the IPTV bearer session. A MBS-REG-REL (SS / MS NAI, MBS Flow ID) message requesting is transmitted to the ACR. In this case, when a fast channel change is required for the IPTV service, the process between the ACR and the PF may be omitted.

The ACR selects the multicast SFID assigned from the multicast IP address and the unicast source IP address included in the IGMP / MLD Leave message, and requests MBS-REG-REL (SS / MS) to request terminal deregistration for the IPTV bearer session. ID, Multicast SFID, 5-tuple, Bandwidth, QoS Priority) message is sent to RAS.

After selecting the multicast CID corresponding to the multicast SFID, the RAS transmits a DSD-REQ message indicating that the requested IPTV service is to be stopped, and receives a DSD-RSP response message from the SS / MS.

At this time, if the IPTV bearer traffic requesting service interruption is only serviced by the terminal requesting the service interruption, the multicast CID is recovered after receiving the DSD-RSP response message, and the radio section resource is released. On the other hand, while receiving the service from the other terminal as well as the terminal requesting the service interruption, since there is a terminal registered for the multicast CID, the multicast CID is not recovered and the radio section resource is not released.

The RAS then sends an MBS-REG-RSP (SS / MS ID, Multicast SFID, MBS Registration Result) message to the ACR indicating that the SS / MS has been deregistered in the IPTV bearer session.

ACR stops IPTV multicast stream transmission when SS / MS is the last terminal registered in RAS for multicast SFID, and MBS-REG-RSP (SS / MS NAI, MBS Flow ID, MBS Registration Result) message Is sent to PF. In this case, when a fast channel change is required for the IPTV service, the process of transmitting a message from the ACR to the PF may be omitted.

FIG. 8 is a flowchart illustrating an operation for fast channel authorization in the MBS providing method according to an embodiment of the present invention, in which a quick channel authentication process is added in comparison with FIG. 6.

Referring to FIG. 8, when the ACR receives an IGMP / MLD join message, which is a message for requesting IPTV bearer traffic from the SS / MS, the ACR performs an IPTV channel authentication process of the user who requested the service.

That is, ACR compares the multicast IP address and unicast source IP address included in the IGMP / MLD join message with the MBS subscriber profile stored in the local DB to determine whether the IPTV bearer traffic requested by the SS / MS user can be serviced. Check it. As a result of the channel authentication decision, when the IPTV bearer traffic selected by the user is not allowed, the ACR discards the IGMP / MLD join message.

On the other hand, if the user authentication determination result that the IPTV bearer traffic selected by the user is a serviceable IPTV service, the ACR sends a charging report to the AAA, and the ACR shown in FIG. It performs the process of sending message and the following.

As described above, since the present invention performs a channel authentication process using the MBS subscriber profile stored in the local DB of the ACR, the user can quickly provide a changed channel to the user when changing the channel by performing a quick channel authentication.

The MBS providing method according to the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. The medium may be a transmission medium such as an optical or metal line, a wave guide, or the like, including a carrier wave for transmitting a signal designating a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

The MBS providing system and method using the WiBro / WiMAX network of the present invention can provide QoS for MBS through the WiBro / WiMAX network.

In addition, the present invention may provide fast channel change by performing fast user authentication in an access control router (ACR).

Claims (23)

A MBS control unit for generating a start and end of a multicast / broadcast service (MBS) bearer session; A QoS controller for requesting allocation and release of quality of service (QoS) for the start and end of an MBS bearer session received from the MBS controller; Allocate a multicast service flow identifier (SFID) for the MBS bearer session to provide the MBS bearer traffic received from the MBS content source to the MBS subscriber terminal when the QoS allocation is requested, and the QoS release is requested An access control router (ACR) for releasing the assigned multicast service flow identifier; And A radio access station for allocating a multicast connection identifier (CID) corresponding to the allocated multicast service flow identifier according to the MBS bearer traffic request of the MBS subscriber, and controlling a radio duration resource with the MBS subscriber station; RAS), The multicast service flow identifier has a unique value to distinguish the MBS bearer session in the same MBS zone, the multicast / broadcast service providing system using a WiBro / WiMAX network. The method of claim 1, The multicast / broadcast service providing system A user authentication server that receives the MBS subscriber profile provided by the MBS control unit and transmits the received MBS subscriber profile to the access control router. Multicast / broadcast service providing system using a WiBro / WiMAX network, characterized in that it further comprises. 3. The method of claim 2, The user authentication server A system for providing a multicast / broadcast service using a WiBro / WiMAX network, which receives user information requesting the MBS bearer traffic from the access control router and performs an authentication process of the user based on the MBS subscriber profile. . A MBS control unit for generating a start and end of a multicast / broadcast service (MBS) bearer session; A QoS controller for requesting allocation and release of quality of service (QoS) for the start and end of an MBS bearer session received from the MBS controller; Allocate a multicast service flow identifier (SFID) for the MBS bearer session to provide the MBS bearer traffic received from the MBS content source to the MBS subscriber terminal when the QoS allocation is requested, and the QoS release is requested An access control router (ACR) for releasing the assigned multicast service flow identifier; A radio access station for allocating a multicast connection identifier (CID) corresponding to the allocated multicast service flow identifier according to the MBS bearer traffic request of the MBS subscriber, and controlling a radio duration resource with the MBS subscriber station; RAS); And Receiving the MBS subscriber profile provided by the MBS control unit, and comprises a user authentication server for transmitting the received MBS subscriber profile to the access control router, The access control router Perform the authentication process of the user who requested the MBS bearer traffic based on the MBS subscriber profile received from the user authentication server, and if the user is authenticated, the multicast service flow identifier and MBS allocated for the MBS bearer traffic; A system for providing a multicast / broadcast service using a WiBro / WiMAX network, characterized by providing bearer traffic to the wireless access station. 5. The method of claim 4, The access control router Perform the authentication process of the user who requested the MBS bearer traffic based on the MBS subscriber profile received from the user authentication server, and if the user is authenticated, the multicast service flow identifier assigned to the MBS bearer traffic is wirelessly accessed. MBS providing unit to provide a station; And MBS for receiving the MBS bearer traffic request, providing user information to the MBS provider, requesting QoS for the MBS bearer session to the MBS provider, and transmitting the MBS bearer traffic to the MBS subscriber terminal of the user. Request Department Multicast / broadcast service providing system using a WiBro / WiMAX network comprising a. A MBS control unit for generating a start and end of a multicast / broadcast service (MBS) bearer session; A QoS controller for requesting allocation and release of quality of service (QoS) for the start and end of an MBS bearer session received from the MBS controller; Allocate a multicast service flow identifier (SFID) for the MBS bearer session to provide the MBS bearer traffic received from the MBS content source to the MBS subscriber terminal when the QoS allocation is requested, and the QoS release is requested An access control router (ACR) for releasing the assigned multicast service flow identifier; A radio access station for allocating a multicast connection identifier (CID) corresponding to the allocated multicast service flow identifier according to the MBS bearer traffic request of the MBS subscriber, and controlling a radio duration resource with the MBS subscriber station; RAS); And Receiving the MBS subscriber profile provided by the MBS control unit, and comprises a user authentication server for transmitting the received MBS subscriber profile to the access control router, The wireless access station An MBS request unit for providing user information on the MBS bearer traffic request to the access control router and transmitting the MBS bearer traffic to the MBS subscriber terminal of the user when the user is authenticated based on the MBS subscriber profile; And The request to assign a multicast connection identifier corresponding to the allocated multicast service flow identifier for the requested MBS bearer traffic, and to provide QoS when forwarding the requested MBS bearer traffic to the MBS subscriber terminal of the user; Radio section resource providing unit for performing radio access control on the MBS bearer traffic to reserve the radio section resources Multicast / broadcast service providing system using a WiBro / WiMAX network comprising a. The method of claim 6, Authentication of the user based on the MBS subscriber profile Multicast / Broadcast service providing system using a WiBro / WiMAX network, characterized in that performed in the access control router. The method of claim 6, Authentication of the user based on the MBS subscriber profile Multicast / Broadcast service providing system using a WiBro / WiMAX network, characterized in that performed in the user authentication server. A MBS control unit for generating a start and end of a multicast / broadcast service (MBS) bearer session; A QoS controller for requesting allocation and release of quality of service (QoS) for the start and end of an MBS bearer session received from the MBS controller; Allocate a multicast service flow identifier (SFID) for the MBS bearer session to provide the MBS bearer traffic received from the MBS content source to the MBS subscriber terminal when the QoS allocation is requested, and the QoS release is requested An access control router (ACR) for releasing the assigned multicast service flow identifier; A radio access station for allocating a multicast connection identifier (CID) corresponding to the allocated multicast service flow identifier according to the MBS bearer traffic request of the MBS subscriber, and controlling a radio duration resource with the MBS subscriber station; RAS); And Receiving the MBS subscriber profile provided by the MBS control unit, and comprises a user authentication server for transmitting the received MBS subscriber profile to the access control router, The MBS control unit When the MBS subscriber is registered, updating the MBS subscriber profile, and provides the updated MBS subscriber profile to the user authentication server, multicast / broadcast service providing system using a WiBro / WiMAX network. delete The method of claim 1, The multicast / broadcast service Multicast / Broadcast service providing system using WiBro / WiMAX network, characterized in that the Internet Protocol Television (IPTV) service. Generating a start and end of an MBS bearer session in a multicast / broadcast service (MBS) control unit; Requesting allocation and release of QoS for the start and end of an MBS bearer session received from the MBS control unit in a quality of service (QoS) control unit; Allocate a multicast service flow identifier (SFID) for the MBS bearer session to provide the MBS bearer traffic received from the MBS content source to the MBS subscriber terminal when the QoS assignment is requested by an access control router (ACR); Releasing the assigned multicast service flow identifier when the QoS release is requested; And A radio access station (RAS) allocates a multicast connection identifier (CID) corresponding to the allocated multicast service flow identifier according to whether the MBS subscriber requests the MBS bearer traffic, and wireless section resources with the MBS subscriber station. Controlling the;  The multicast service flow identifier has a unique value so as to distinguish the MBS bearer session in the same MBS zone, the multicast / broadcast service providing method using a WiBro / WiMAX network. The method of claim 12, The multicast / broadcast service providing method Receiving an MBS subscriber profile provided from the MBS control unit at a user authentication server, and transmitting the received MBS subscriber profile to the access control router; Method for providing a multicast / broadcast service using a WiBro / WiMAX network, characterized in that it further comprises. 14. The method of claim 13, Transmitting the received MBS subscriber profile to the access control router The user authentication server receives the user information requesting the MBS bearer traffic from the access control router, and performs the authentication process of the user based on the MBS subscriber profile multicast / using WiBro / WiMAX network How to provide broadcast service. Generating a start and end of an MBS bearer session in a multicast / broadcast service (MBS) control unit; Requesting allocation and release of QoS for the start and end of an MBS bearer session received from the MBS control unit in a quality of service (QoS) control unit; Allocate a multicast service flow identifier (SFID) for the MBS bearer session to provide the MBS bearer traffic received from the MBS content source to the MBS subscriber terminal when the QoS assignment is requested by an access control router (ACR); Releasing the assigned multicast service flow identifier when the QoS release is requested; A radio access station (RAS) allocates a multicast connection identifier (CID) corresponding to the allocated multicast service flow identifier according to whether the MBS subscriber requests the MBS bearer traffic, and wireless section resources with the MBS subscriber station. Controlling; Receiving an MBS subscriber profile provided from the MBS control unit at a user authentication server, and transmitting the received MBS subscriber profile to the access control router; And The access control router performs the authentication process of the user who requested the MBS bearer traffic based on the MBS subscriber profile received from the user authentication server, and if the user is authenticated, the multicast service allocated to the MBS bearer traffic. Providing a flow identifier and the MBS bearer traffic to the radio access station Method for providing a multicast / broadcast service using a WiBro / WiMAX network, characterized in that it comprises a. 16. The method of claim 15, Providing the MBS bearer traffic to the wireless access station Receiving the MBS bearer traffic from the MBS subscriber terminal of the user; Performing an authentication process of the user who requested the MBS bearer traffic based on the MBS subscriber profile received from the user authentication server; And If the user is authenticated, providing a multicast service flow identifier assigned to the MBS bearer traffic to the radio access station, and transmitting the MBS bearer traffic to the MBS subscriber terminal of the user. Method for providing a multicast / broadcast service using a WiBro / WiMAX network, characterized in that it comprises a. 14. The method of claim 13, The multicast / broadcast service providing method Receiving the MBS bearer traffic request from the MBS subscriber terminal of the user at the radio access station, and providing user information on the MBS bearer traffic request to the access control router; Allocating a multicast connection identifier corresponding to the multicast service flow identifier assigned for the requested MBS bearer traffic at the wireless access station when the user is authenticated based on the MBS subscriber profile; And Requesting a QoS reservation for allocating a radio interval resource with the MBS subscriber station of the user at the radio access station, and transmitting the MBS bearer traffic to the user's MBS subscriber station; Method for providing a multicast / broadcast service using a WiBro / WiMAX network, characterized in that it comprises a. 18. The method of claim 17, Authentication of the user based on the MBS subscriber profile The multicast / broadcast service providing method using a WiBro / WiMAX network, characterized in that performed in the access control router. 18. The method of claim 17, Authentication of the user based on the MBS subscriber profile The multicast / broadcast service providing method using a WiBro / WiMAX network, characterized in that performed in the user authentication server. 14. The method of claim 13, The multicast / broadcast service providing method Updating the MBS subscriber profile when the MBS subscriber is registered in the MBS controller, and providing the updated MBS subscriber profile to the user authentication server; Method for providing a multicast / broadcast service using a WiBro / WiMAX network, characterized in that it further comprises. delete The method of claim 12, The multicast / broadcast service A method of providing a multicast / broadcast service using a WiBro / WiMAX network, which is an Internet Protocol Television (IPTV) service. A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 12 to 20 and 22.

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